Hi bluwater1959. My name is Straight Talk John and I will be addressing your question. Our BYOP (Bring Your Own Phone) program will only work with GSM phone particularly on AT&T, T-Mobile, unlocked domestic phones. We are not able to use phones which doesn't have a SIM card slot or any CDMA phone. For more details of this program, you may also visit: www.straighttalksim.com.
bluwater, cdma phones do not have sim cards. It is possible to have cdma phones professionally reflashed to work on the straight talk verizon towers, but this is rather expensive ($65 to $100). It might be better to buy a new phone.